376 results about "Surface measurement" patented technology

An example system may have a payload for an inspection robot structured to move in a direction of travel on an inspection surface. The payload may have a first sensor holder structured to support a first ultrasonic (UT) phased array at a first orientation, a second sensor holder structured to hold a second ultrasonic (UT) phased array at a second orientation, and a sensor holder linking component interposed between the first sensor holder and the second sensor holder. The sensor holder linking component may be structured to interact with the first and second sensor holders such that the first UT phased array and the second UT phased array are placed in a parallel configuration along a long edge of both the first and second UT phased array, and the first sensor holder and the second sensor holder are pivotably connected to the sensor holder linking component.

The invention relates to the technical field of precise geometric quantity measurement, and discloses an electronic component size and contour automatic metering method, which comprises the following steps: calculating a nominal truncation phase distribution diagram of a to-be-measured electronic component by using a virtual projection imaging model, controlling a projection unit to project a single-frequency sine stripe grating to the electronic component and collecting a deformed stripe image, calculating the gradient of the modulation degree distribution map and extracting edge contour features to solve the actual pose of the assembly; performing modulo 2pi differential operation on the nominal and actually measured truncated phase distribution maps, and eliminating high-gradient artifacts by using an edge mask to generate a phase residual map; and converting the phase residual image into a height deviation distribution diagram according to the phase height mapping relation, and by constructing a phase domain differential metering channel, the phase unwrapping ambiguity in discontinuous surface measurement is avoided.

The invention relates to the technical field of surface measurement, in particular to a road surface flatness rapid detection method based on a laser radar, which comprises the following steps: collecting vehicle attitude data to form a three-dimensional vector, mapping laser data to a space coordinate system, identifying a projection difference adjustment track, detecting a disturbance generation distribution area, and transversely distributing a translation direction line. Uniformly projecting to construct a reference line, extracting an echo and time index recombination time sequence segment, analyzing a point number trend to screen a stable segment, and extracting symmetric points to compare an included angle to generate a closed zone. According to the method, the attitude vectors of the vehicle in rolling, pitching and yawing states are obtained, the laser echo distance measurement data are mapped to the absolute space coordinate system, and the included angle difference between the distance measurement direction and the ground direction is accurately calculated, so that the space matching precision of a measurement path is remarkably improved, and a longitudinal section analysis result is closer to a real road state; and the space integrity, the track smoothness and the section structure rationality of the whole measurement process are comprehensively optimized.

The invention discloses an optical element surface measuring device and method. The device comprises a light source module, a motion table, a laser energy monitoring module, a photoelectric detection module, a space triangular focus positioning module, a projection module, a binocular vision module and a processing module. According to the technical scheme, the laser energy monitoring module records laser pulse energy in real time, the photoelectric detection module accurately measures the radius of a focusing light spot, the space triangular focus positioning module accurately positions the focus position, and the projection module projects interference fringes of a periodic structure to the surface of the optical element to be measured. The binocular vision module is used for capturing interference fringe changes, and micro-deformation or damage is judged by combining a phase shift and unwrapping algorithm, so that three-dimensional reconstruction of the micro-deformation and damage morphology of the surface of the optical element is realized. The real-time online measurement of the micro-deformation and the damage threshold of the optical element is realized, and the damage threshold evaluation process is optimized. The method has the advantages of high precision, high real-time performance, high automation degree, wide application range and the like.

A Beidou / GNSS-based real-time high-precision sea surface measurement method and a buoy, wherein by using free-to-use broadcast ephemeris freely broadcast by GNSS satellites, precise point positioning of China's Beidou satellites, and other high-precision service space signals, real-time centimeter-level element information comprising time, longitude, latitude, water level, wave height, wave period, wave direction, sea surface current velocity and direction, atmospheric water vapor content, and the like can be directly obtained. The information can be stored locally in a buoy or transmitted back by communication, and is suitable for real-time high-precision sea surface measurements in offshore and far-sea scenarios.

A computer-implemented method of determining dose delivered by a radiotherapy system to a plurality of locations within a region of patient anatomy includes: during a first time segment of a treatment fraction, causing the radiotherapy system to be in a first machine state; during the first time segment, delivering radiation to the region of patient anatomy; generating a first surface map for the region of patient anatomy based on surface measurements acquired during the first time segment; generating a first modified digital volume of the region based on the first surface map; and for each of the plurality of locations within the region of patient anatomy, determining a first radiation dose that is delivered to the location during the first time segment, wherein the first radiation dose is based on the first machine state of the radiotherapy system and the first modified digital volume.

The present invention belongs to the technical field related to precision measurement, and discloses an orthogonal line spectrum confocal scanning profile measurement sensor and an anti-vibration method. The sensor includes a light source module, and first and second direction linear dispersion confocal imaging modules. The light source module is used to generate two beams of orthogonal collimated white light. The two beams of orthogonal collimated white light enter the first and second direction linear dispersion confocal imaging modules respectively, thereby scanning the surface of the sample to be measured and imaging, thereby obtaining the surface profile of the sample to be measured at two orthogonal angles. The first direction linear dispersion confocal imaging module includes a first linear dispersion confocal structure, a second slit, and a first imaging unit. The second direction linear dispersion confocal imaging module includes a second linear dispersion confocal structure, a third slit, and a second imaging unit. The directions of the second and third slits are respectively the same as the directions of the two orthogonal slits in the first slit. Through the present invention, the problem of vibration affecting measurement accuracy during line scanning surface measurement is solved.

The invention relates to the technical field of vibro-replacement gravel pile digital modeling, in particular to a vibro-replacement gravel pile three-dimensional model generation method and device and a medium. The depth L1 of the guide hole, the depth L2 of the formed hole, the weight G2 of the gravel filler, the thickness L3 of the inverted filter section, the weight G1 of the gravel filler and the radius r of the ground surface pile are calibrated, the pile radius r2 of the gravel pile on the fourth layer is calculated, and the pile radius r1 of the gravel pile on the fifth layer is calculated; and establishing coordinates of the A point, the B point, the C point, the D point and the E point, performing fitting to generate a smooth curve function f (x), and obtaining an entity three-dimensional cylinder engineering file based on the smooth curve function f (x). The mode of morphological segmentation, direct earth surface data measurement, pile diameter segmentation estimation and form trend centering is adopted, and the similarity between a fitted spline curve and a profile curve of an actual pile reaches 90% or above.

The invention relates to the technical field of geophysical exploration, in particular to an optimal selection method for an oil-gas structure favorable area of a low-exploration-degree area of a mountain-front thrust zone. The method comprises the following steps: selecting an oil and gas prospective area, carrying out surface geological survey based on a regional geological map, compiling a surface fracture structure outline map and determining a main structure trend; performing wavelet decomposition on the gravity data to determine a substrate fracture adaptation result; deploying a magnetotelluric sounding profile in a direction perpendicular to the structure to obtain an electrical model, and compiling a substrate fracture diagram; deploying a sounding profile and a wide-line two-dimensional seismic profile fixed low-resistance strip in a parallel structure trend; a base depth map is calibrated, and a hidden strike-slip fracture layout is tracked; performing mesh generation to calculate indexes, performing standardized assignment, and performing mean value gridding; and preferably selecting an oil-gas structure favorable area by combining a drilling gas content fixed boundary. By adopting the ground measurement and multi-geophysical technology, the method is low in cost, simple to operate, high in efficiency and adaptive to a low exploration area, the optimization accuracy is improved, and powerful technical support is provided for optimization of an oil-gas exploration target area.

The invention relates to a workpiece measurement coordinate system determination method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring surface measurement data at each preset measurement position and tail end pose information of the mobile robot; converting the surface measurement data to a robot coordinate system of the mobile robot through the tail end pose information of each preset measurement position to obtain measurement point cloud data of the calibration workpiece; measuring point location information is extracted according to the measuring point cloud data; matching the point location information of the measuring points with known data information of the measuring points, and determining an optimal transformation solution meeting a conversion condition; converting the plurality of known reference point location data into a robot coordinate system through the optimal transformation solution to obtain a plurality of system establishment calibration points; and establishing a workpiece measurement coordinate system based on the plurality of system establishment calibration points. By adopting the method, the determination accuracy of the measurement coordinate system can be improved.

Interactive methods and systems for displaying measurements of objects and surfaces based on co-registered images and three-dimensional (“3D”) scene geometry. A scene is displayed from a first view, control points are designated within the scene, and 3D positions of the control points are computed. Thereafter, the scene and each respective control point is displayed from a second view, and the locations of the control points are adjusted as necessary to correspond to their desired locations in the second view. New 3D positions for the control points are computed accordingly. A measurement is determined based on the computed 3D positions of the control points, and the measurement is displayed via a graphical user interface.

The invention relates to the technical field of measurement, and provides a water depth measurement device convenient to use, which comprises a measurement ship body, a bearing frame, a suspension frame assembly, a water depth measurement mechanism and a measurement auxiliary mechanism, a winding wheel and a first angle sensor in the length metering assembly are fixedly connected with a first transverse rotating shaft, the second driving part is in transmission connection with the first angle sensor, a gravity ball in the falling part is wound around the surface of the winding wheel through a steel wire, and the measurement auxiliary mechanism comprises a fixing assembly and a swing assembly. A longitudinal pipe in the fixing assembly is installed above the fixing shell, a balance column in the swing assembly is connected with the fixing shell, a swing arm is fixedly connected between the balance column and a second transverse rotating shaft, a threading ring is fixedly connected with the balance column, the balance column is in sliding connection with an arc-shaped guide rail, and a steel wire penetrates through the longitudinal pipe and the threading ring. The device has the advantages of being convenient to use and accurate in measurement.

The invention discloses a novel symmetric iteration nearest point cloud registration calculation method for quality detection, and the calculation method comprises the steps: setting a point set and a point set in a three-dimensional space, carrying out the registration of a point set P and a point set Q, so as to solve a six-degree-of-freedom rigid body transformation matrix, and carrying out the registration of the point set P and the point set Q; the six-degree-of-freedom rigid body transformation matrix comprises a three-degree-of-freedom rotation matrix R and a three-degree-of-freedom translation vector t; a weighted point-surface model is constructed, and a symmetric iteration nearest point objective function based on weighted point-surface measurement and an adaptive robust loss function is constructed based on the weighted point-surface model; the calculation of the symmetric iteration nearest point objective function based on the weighted point-surface measurement and the adaptive robust loss function comprises the step of alternately executing a corresponding point updating step and a registration step until a convergence condition is met.

A system includes a robotic arm, a rotisserie control linkage, and a computer system. The robotic arm includes a touch probe and laser head. The rotisserie control linkage is configured to couple to a transport cart. The computer system is communicatively coupled to the robotic arm and the rotisserie control linkage and is configured to control the system to probe, using the touch probe of the robotic arm, a transparent outer layer of an aircraft canopy located on the transport cart in order to determine surface measurements of the aircraft canopy. The computer system also controls the system to ablate, using a plurality of predetermined parameters and the laser head of the robotic arm, an interface layer located between the transparent outer layer and the aircraft canopy, wherein movements of the robotic arm during the ablation are based on the surface measurements.

A measuring device is provided with an improved contact property of a measuring surface of a sensor with respect to a surface of a target object. The measuring device includes a main body and a probe that has a head section at the distal end thereof and an arm section connecting the head section to the main body. The head section has a support portion, a measuring portion, and a coupling portion. The support portion is connected to the distal end of the arm section. The measuring portion has a first surface at which a measuring surface of a sensor is exposed and a thickness with the first surface as a datum plane. The coupling portion is disposed between and couples the measuring portion and the support portion. The coupling portion has a first connection portion connected to the measuring portion and a through hole.

The invention relates to the technical field of underground medium density inversion, in particular to an underground medium density inversion method and system based on high-precision microgravity, and the method comprises the steps: obtaining the gravity data of each observation point in an underground medium density inversion ground surface measurement region; calculating a superposition abnormal value of each gravity subsequence of each observation point, extracting a superposition characteristic value of each modal component, obtaining the superposition interference confidence of each gravity subsequence of each observation point, obtaining the superposition influence persistence of each observation point, adjusting the wavelet threshold of the wavelet transform of the gravity data on each observation point, and calculating the superposition abnormal value of each gravity subsequence of each observation point. And correcting the gravity data of each observation point after denoising processing to extract Bouguer gravity anomaly of each observation point, and obtaining an inversion result of the underground medium density through a Parker-Oldenburg density interface inversion algorithm. According to the method, the underground medium density can be effectively and accurately inverted through the high-precision microgravity data.

The invention relates to the field of jaw crusher feeding. According to the material level closed-loop control method for the jaw crusher, a support 2 extending in the direction of the jaw crusher 4 is installed on the side portion of a draw shaft 1, and a radar material level indicator 3 which can completely measure the surface of mineral aggregate in an inner cavity of the jaw crusher 4 and has a surface measurement function is installed on the support above an opening of the jaw crusher 4. The heavy plate ore feeder 5 is connected with a discharging port in the bottom of the draw shaft 1 and a feeding port of an inner cavity of the jaw crusher 4, and the heavy plate ore feeder 5 and the radar level gage 3 are in electric signal connection with the PLC. According to the implementation of the invention, the accuracy of measuring the material level in the machine cavity of the jaw crusher can be improved, and the material level signal is used for performing closed-loop control on the frequency (variable frequency motor) of the heavy plate feeder, so that the full feeding of the crusher is realized, the mineral crushing granularity is improved, the entering of strip-shaped ores into the next process is reduced, and the unattended operation of the crusher is realized.

An optical inspection system is provided with a fixture for supporting a glass sheet, the fixture having an optical reference. The ultraviolet laser and associated optics form a planar, sheet-shaped laser beam that intersects the surface of the glass sheet, thereby causing the surface to fluoresce and form visible wavelength lines on the surface. The camera has an image sensor for detecting an optical reference and a visible wavelength line across at least a portion of the width of the sheet. The control system is configured to (i) image the optical reference on the stationary device, (ii) define an optical reference coordinate system from the imaged optical reference, (ii) receive a mathematical model of the glass sheet in a model coordinate system, and (iii) associate the optical reference coordinate system with the model coordinate system via at least one transformation. A method of using the non-contact optical inspection system is also provided.

The invention relates to the technical field of electromagnetic calculation, in particular to a high-precision calculation method capable of achieving far-field calculation of a lightning electromagnetic field, and the method comprises the steps: precisely obtaining ground surface characteristics and atmospheric parameters on an electromagnetic field propagation path through fusing remote sensing data and ground surface measurement data, building a finer environment parameter set, and achieving the far-field calculation of the lightning electromagnetic field. And the dynamic characteristics of the lightning electromagnetic field propagation environment are fully considered. By analyzing the influence of the surface roughness on the electromagnetic wave reflection power and correcting the propagation loss parameter, the electromagnetic wave propagation precision is enhanced, and the influence of the surface medium is quantified more accurately. Based on a dielectric property abrupt change area on a propagation path, an equivalent reflectivity change and a refractive index adjustment amount are calculated, and a boundary condition of a nonlinear partial differential equation is corrected, so that propagation simulation of a lightning electromagnetic field in a complex medium environment is closer to a real condition. In the dynamic boundary correction process, the changes of the dielectric constant, the magnetic conductivity and the refractive index of the abrupt change area are accurately adjusted.

The invention relates to a laser interference surface type measurement method using random mechanical disturbance for resolving. The method comprises the following steps: acquiring an interference image of a measured element by using a surface type measurement device based on laser interference; applying random mechanical disturbance to the surface type measuring device to cause the change of the relative pose between the reference mirror and the measured element so as to acquire N frames of interference images in different disturbance states; and processing the acquired interference images through a natural phase decoding algorithm to obtain the surface topography of the measured element. Compared with the prior art, high-precision measurement of the surface type of the measured element can be realized without vibration isolation equipment and a high-precision phase shifter, and the method has the advantages of low cost, low system complexity and high adaptability.

The invention discloses a three-coordinate measuring machine based on special-shaped surface measurement. An upper working surface where a working table is located is used for bearing a to-be-measured piece; the measuring mechanism is arranged on the moving portal frame, the moving portal frame is made to move on the workbench, and a to-be-measured piece is measured through the measuring mechanism. A measuring head of the measuring mechanism is arranged at the front end portion where the first movement assembly is located, meanwhile, a first air bag pushing piece is arranged at the rear end portion where the first movement assembly is located, and the first air bag pushing piece is inflated and deflated to be matched with a measuring head piece at the front end portion to synchronously achieve axial pivoting movement. And the second movement assembly is located above the first movement assembly, so that the pivoting movement of the first movement assembly and the second movement assembly drives the measuring head piece to move in the whole space direction, and the full-angle scanning measurement of the to-be-measured piece by the measuring head piece is formed. The whole device can realize high-precision measurement of small-size measurement pieces, and the measurement efficiency is improved.

The invention discloses a method for measuring the number of layers of a two-dimensional material by utilizing Goos-Haenchen displacement, which comprises the following steps: establishing a Goos-Haenchen displacement theoretical database when a horizontal polarized light beam is reflected on the surfaces of the two-dimensional materials with different layers at different incident angles according to a theoretical relation model of the two-dimensional materials with different layers and the Goos-Haenchen displacement; enabling the horizontal polarization incident light beam to be incident to the surface of the measured two-dimensional material at a certain incident angle; measuring Goos-Hanchen shift generated by the reflected light beam under the condition; sequentially changing the incident angles to obtain a group of Goos-Hanchen shift measurement data under different incident angles; and comparing and analyzing the measured data with theoretical data in a Goos-Hanchen shift theory database to obtain the number of layers of the measured two-dimensional material. Compared with a traditional two-dimensional material layer number measuring method, such as a Raman spectrum method, an atomic force microscopy method and a transmission electron microscope method, the method is easy to operate and high in measuring efficiency, does not damage a sample and has a good application prospect.

The invention provides a part profile measurement path planning method, device and equipment and a storage medium, which are applied to the field of digital detection of mechanical parts, and the method comprises the steps: carrying out the sampling processing point by point on a target part profile according to the total number of input sampling points, and determining a plurality of profile measurement points; constructing a measurement path planning model according to the total number of the sampling points, the position information of each profile measuring point and the distance between any two profile measuring points; the measurement path planning model is a model which meets the requirement that the path distance experienced by traversing a plurality of molded surface measurement points is shortest under the condition that the total number of sampling points is not changed; generating a plurality of initial solutions corresponding to the measurement path planning model according to the total number of the sampling points, the plurality of profile measurement points and a preset number of initial solutions; and performing teaching processing on the plurality of initial solutions by adopting a teaching and learning algorithm, determining a candidate solution of each initial solution after teaching, and determining a target solution corresponding to the measurement path planning model according to each candidate solution. By adopting the technical scheme of the invention, the part profile detection efficiency and detection precision can be improved.

The invention discloses a coordinate measurement-based high-gradient free-form surface measurement and evaluation method and system. The coordinate measurement-based high-gradient free-form surface measurement and evaluation method comprises the following steps of: dividing a to-be-measured curved surface of an element into a plurality of sub-surface patches with overlapped regions according to surface shape characteristics of the element; searching an optimal measurement point and a measurement path on the curved surface to be measured; adjusting the pose of the coordinate measuring machine by using a pose adjusting mechanism, and sequentially measuring the surface shape of each sub-surface patch through the coordinate measuring machine according to the optimal measuring point and the measuring path; and matching and splicing the overlapped areas of the surface shapes of the adjacent sub-surface patches to obtain a complete surface shape of the to-be-measured curved surface for surface shape precision evaluation of the to-be-measured curved surface. The invention aims to improve the detection precision of the optical element so as to improve the manufacturing precision of an optical system and improve the imaging quality of the optical system, and can be widely applied to the design and manufacturing of a next-generation optical system.

The invention relates to a method for interferometric surface measurement of a test specimen, a computer-generated hologram (CGH) and an interferometric test arrangement. In a method according to the invention, an interferometric superposition of a test wave directed by a CGH (120, 220, 320, 410, 420, 430, 510) onto the test piece (140, 240, 340, 540) and reflected therefrom is carried out with a reference wave not reflected at the test piece, wherein, based on a further interferometric superposition of light reflected at at least one Littrow structure (122, 222, 322, 412, 422, 432, 512) of the CGH with light reflected at a reference surface, a contribution to the optical effect of the CGH caused by a deformation present at the CGH is determined, and wherein a determination of the fit of the test piece (140, 240, 340, 540) is carried out taking this contribution into account.

The invention relates to a thin-wall part profile measuring system and method, and the system comprises a workpiece table which is used for placing a to-be-measured thin-wall part; the positive view angle data acquisition subsystem is used for acquiring positive view angle morphology data of the to-be-measured thin-walled workpiece; the anti-view-angle data acquisition subsystem is used for acquiring anti-view-angle morphology data of the to-be-measured thin-walled workpiece; the three-dimensional calibration plate is used for calibrating the relative positions of the positive view angle data acquisition subsystem and the negative view angle data acquisition subsystem; and the upper computer is used for controlling time-sharing triggering of the positive view angle data acquisition subsystem and the negative view angle data acquisition subsystem to obtain positive view angle morphology data and negative view angle morphology data, splicing the positive view angle morphology data and the negative view angle morphology data, and obtaining the three-dimensional reconstruction morphology of the to-be-measured thin-walled workpiece. Compared with the prior art, the method has the advantages of high measurement precision, low cost, high practicability and the like.

A surface shape measurement device (10) that measures a surface shape of a belt wrapped around a pulley and driven to rotate around, the surface shape measurement device including: a belt surface measurement unit (11) configured to measure the surface shape of the belt and a surface shape of the pulley; and a control unit (15) configured to compute the surface shape of the belt, based on measurement data for the surface shape of the belt and the surface shape of the pulley that have been measured, wherein the control unit estimates a measurement position in a circumferential direction of the belt from the measurement data for the surface shape of the pulley, and computes the surface shape of the belt by associating the measurement data for the surface shape of the belt with the measurement position.

The application belongs to the technical field of three-dimensional measurement, and particularly discloses a metal surface measurement method and system based on photometric stereo and binocular structured light. The method comprises the following steps: acquiring original depth point cloud of a mirror surface region of a surface to be measured by using a binocular camera; acquiring complete normal vector data of the surface to be measured by using a photometric stereo method; and fusing the original depth point cloud and the normal vector data to calculate surface point cloud of the surface to be measured. The measurement data of the binocular structured light and the near-field photometric stereo are combined, the missing measurement data of the metal surface caused by the mirror reflection is complemented, the mutual fusion of the height data and the normal vector data is utilized, and the accuracy of surface reconstruction is improved.

The invention discloses hot galvanizing furnace nose wallboard spraying equipment, and relates to the field of electric arc spraying, the hot galvanizing furnace nose wallboard spraying equipment comprises a wallboard clamping device, a three-axis positioning device located on one side of the wallboard clamping device, and an electric arc spraying device and a plate surface measuring device which are symmetrically arranged at the execution end of the three-axis positioning device. The spraying equipment can automatically plan and realize intermittent jumping spraying, and the risk of microcracks of a coating due to thermal stress is effectively avoided; according to the scheme, a control center serves as a core, wall plate clamping, three-axis positioning, curved surface measuring and electric arc spraying devices are dispatched in a unified mode, and whole-course automatic operation from plate body clamping, posture correction, contour scanning to final spraying is achieved.

The present invention discloses a method for measuring, locating, and inspecting a semi-ellipsoidal surface for a containment bottom head, comprising the following steps: Step 1: directly measuring the vertical distance R from the inspection point to the center at the center of the nuclear island; alternatively, measuring the three-dimensional measured data (X, Y, Z) of the inspection point at any position and then calculating the vertical distance R from the inspection point to the center; Step 2: calculating the vertical distance L from the inspection point to the major semi-axis of the ellipsoid based on the vertical distance R from the inspection point to the center; and Step 3: calculating the elevation deviation ΔH of the inspection point. This method can quickly and intuitively determine whether the reinforcement construction at the bottom of the semi-ellipsoid meets the requirements, and can quickly provide the concrete pouring elevation of the semi-ellipsoid bottom surface and inspect whether the poured layer is qualified at the construction site.